Frame for a bicycle trainer



FIG. 1 is an isometric view of a bicycle trainer frame incorporating my new design, wherein the portions illustrated in phantom form no part of the claimed design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design of a frame for a bicycle trainer, as shown and described. 